Zobrazeno 1 - 10
of 57
pro vyhledávání: '"R. A. Perley"'
Autor:
Anna Y. Q. Ho, Daniel A. Perley, Yuhan Yao, Dmitry Svinkin, A. de Ugarte Postigo, R. A. Perley, D. Alexander Kann, Eric Burns, Igor Andreoni, Eric C. Bellm, Elisabetta Bissaldi, Joshua S. Bloom, Thomas G. Brink, Richard Dekany, Andrew J. Drake, José Feliciano Agüí Fernández, Alexei V. Filippenko, Dmitry Frederiks, Matthew J. Graham, Boyan A. Hristov, Mansi M. Kasliwal, S. R. Kulkarni, Harsh Kumar, Russ R. Laher, Alexandra L. Lysenko, Bagrat Mailyan, Christian Malacaria, A. A. Miller, S. Poolakkil, Reed Riddle, Anna Ridnaia, Ben Rusholme, Volodymyr Savchenko, Jesper Sollerman, Christina Thöne, Anastasia Tsvetkova, Mikhail Ulanov, Andreas von Kienlin
Full list of authors: Ho, Anna Y. Q.; Perley, Daniel A.; Yao, Yuhan; Svinkin, Dmitry; Postigo, A. de Ugarte; Perley, R. A.; Kann, D. Alexander; Burns, Eric; Andreoni, Igor; Bellm, Eric C.; Bissaldi, Elisabetta; Bloom, Joshua S.; Brink, Thomas G.; Dek
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d679da0d63c1eb7e69b4104685b5c375
http://hdl.handle.net/11589/244180
http://hdl.handle.net/11589/244180
Autor:
K. M. B. Asad, Oleg Smirnov, M. S. de Villiers, Kshitij Thorat, S. Makhathini, Julien N. Girard, R A Perley, K. Iheanetu
Modern interferometric imaging relies on advanced calibration that incorporates direction-dependent effects. Their increasing number of antennas (e.g. in LOFAR, VLA, MeerKAT/SKA) and sensitivity are often tempered with the accuracy of their calibrati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3dce4077b8ac75c553abdf6baa204821
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 386:337-347
Analysis of the radio synchrotron and X-ray inverse-Compton emission from radio-loud active galaxies allows us to determine their particle acceleration processes and electron energy spectra. Previous studies have provided new constraints on the total
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dac97171ee6fb9921541940858697a50
https://doi.org/10.1111/j.1365-2966.2008.13028.x
https://doi.org/10.1111/j.1365-2966.2008.13028.x
Publikováno v:
Astronomy & Astrophysics. 385:L27-L30
Using new deep VLA and HST observations of the large-scale jet in 3C273 matched to 0.3" resolution, we have detected excess near-ultraviolet emission (300 nm) above a synchrotron cutoff spectrum accounting for the emission from radio through optical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27d29b2e03a4538563655e140055d00b
https://doi.org/10.1051/0004-6361:20020278
https://doi.org/10.1051/0004-6361:20020278
Publikováno v:
The Astronomical Journal. 119:1526-1533
We report on two programs to address differential evolution between the radio-loud and radio-quiet quasar populations at high (z>4) redshift. Both programs entail studying the radio properties of optically-selected quasars. First, we have observed 32
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f373588b9bf98d21b5020f980caefee
https://doi.org/10.1086/301316
https://doi.org/10.1086/301316
Publikováno v:
The Astrophysical Journal Supplement Series. 124:285-381
Maps of 212 extragalactic radio sources at 4.9 GHz are shown in Stokes I along with linear polarization vectors. The objects have a declination range of 0° to -35° and were chosen from the Hewitt & Burbidge quasar catalog with a spectral index less
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe72560a89b2ba23055008d6a4ec7562
https://doi.org/10.1086/313259
https://doi.org/10.1086/313259
Autor:
J. P. Leahy, A. R. S. Black, J. Dennett-Thorpe, M. J. Hardcastle, S. Komissarov, R. A. Perley, J. M. Riley, P. A. G. Scheuer
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 291:20-53
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39ab554f54b5688bb379108e4b0ef7b5
https://doi.org/10.1093/mnras/291.1.20
https://doi.org/10.1093/mnras/291.1.20
Publikováno v:
Symposium - International Astronomical Union. 175:503-506
Early large scale radio surveys of the sky were made with instruments with poor imaging quality and were limited to measuring positions and brightnesses of discrete sources. In recent decades radio interferometric arrays have dramatically increased t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dca5fa7a04d932387a697b8d2894b0d7
https://doi.org/10.1017/s0074180900081651
https://doi.org/10.1017/s0074180900081651
Publikováno v:
Symposium - International Astronomical Union. 158:243-246
In 1984 Perley and Erickson proposed a 73.8 MHz [4 meter wavelength] observing system at the VLA site (NRAO Scientific Memo #146). They proposed a stand-alone antenna system that would feed its signals into an existing spare channel of the VLA wavegu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::404aaa2c59b51ef7014d84251c64f809
https://doi.org/10.1017/s0074180900107685
https://doi.org/10.1017/s0074180900107685
Autor:
T. J. Cornwell, R. A. Perley
Publikováno v:
International Astronomical Union Colloquium. 131:184-187
The general relation between interferometric data and sky brightness requires the use of three-dimensional Fourier transforms. Only in special cases does the standard two-dimensional Fourier relations result in images free of distortions. For the VLA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a39cc8a6e0899f1dc17bcc7401d55790
https://doi.org/10.1017/s0252921100013270
https://doi.org/10.1017/s0252921100013270